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Old 03-23-2015
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Cool what is the mode of inheritance?

A 22-year-old woman of European descent presents with progressive exercise intolerance. She has a brother who has epilepsy and hearing loss. Her mother has hearing loss and poor night vision. Other members of her family also have a history of epilepsy. Geneticists have been consulted and have mapped out a pedigree (see imag as attachment.


Which pattern of inheritance is shown in the image?

AR
AD
XR
XD
Mitchondrial

why?
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what is the mode of inheritance?-image.jpg  
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  #2  
Old 03-23-2015
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Default This is Mitochondrial

Progressive exercise intolerance, epilepsy and hearing loss, poor night vision. mitochondrial problems cause problems related to muscle and nervous system. Also pedigree shows that all children of affected mothers (I-1, II-2) are also affected but non of the children of affected father(II-3) are affected. This is because every mitochondria are inherited from mother.
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